QML and Qt Quick

@difix said in Emit not fire when client connected to server.: qmlRegisterUncreatableType really thanks. yes this is my problem. I create socket in main.cpp and also I create it again in qml

// These icons are different MouseArea { acceptedButtons: Qt.LeftButton | Qt.RightButton anchors.fill: parent preventStealing: true cursorShape: pressedButtons & Qt.RightButton ? Qt.ClosedHandCursor : Qt.ForbiddenCursor } // The icon is the same pressed or released. Given the behavior above, this can only mean the two icons are identical when they should not be. MouseArea { acceptedButtons: Qt.LeftButton | Qt.RightButton anchors.fill: parent preventStealing: true cursorShape: pressedButtons & Qt.RightButton ? Qt.ClosedHandCursor : Qt.OpenHandCursor }

I also asked this question here: Even If I used signals and slots to invoke the methods not directly from javascript I still get these errors: https://stackoverflow.com/questions/65328173/how-to-delete-row-from-tableview-properly/65382947?noredirect=1#comment115712152_65382947

@jsulm Can you elaborate top level widget seq fault. what it seems to be from the stack trace so that i dig up that area. Do you think it is an memory issue?

I took a look at the DeclarativeChart class and it does use QChart under the hood (but does not inherit from it). Your backend should really be independent of your GUI. Only provide data and then you can update your series in your QML code.

When I have an executable that is paused in gdb, this is the command I use to get all stack traces of all threads at once: thread apply all bt I'm not sure if that will work on a core file, but I am optimistic that it would. As for stepping into the exec().... Are you literally using the "step" command? "s" or "step"? I would think you could just tell the program to "run" (no stepping). Then pause/break the debugger when the white screen occurs. But that might be what you tried and I am misunderstanding. The helpfulness of the stack traces is going to depend on whether your Qt libraries contain symbols. Anyhow, sorry to say it, but I'm about run out of ideas. It does seem like a "clue" that your application still works in the desktop edition and is only misbehaving in the QNX edition. Are there any "knobs you can turn" in QNX? Give the program more memory or more cores/threads? Loosen the program's timing goals/constraints? (Again, I have no direct experience with QNX). Maybe there are QNX system tools that would be instructive? Ways to ask QNX to tell you information about the running app? Maybe QNX would report that the app has been frozen by the kernel for some reason?

@Tryhard said in Is there a QT project-specific configuration file available ? There is the .pro.user file, but that can't go cross platform.: Yep that should do it !! Thanks y'all ! Are you calling your issue solved? If so, please don't forget to mark your post as such! Thanks.

@jeremy_k I'm now looking at a template based solution as suggested on the SO question (https://stackoverflow.com/a/65401996/447438). The ideas has been in my head for a couple of days, and the post pushed me to look more deeply into it.

Look into conditional binding: https://doc.qt.io/qt-5/qml-qtqml-binding.html#conditional-bindings At some point you bind to the value based upon a condition. That would be in the when clause: Binding { target: myMainObject.myTarget property: "someProperty" value: thisComboBox.currentIndex when: <some condition> } You might want to look at restoreMode in case you have a value or binding you need to restore.

@maxwell31 Add in Dialog component Dialog { width: 400 ... The error will go away.

OK. This is done by setting: boundsBehavior: Flickable.StopAtBounds